82691019475 has 6 divisors (see below), whose sum is σ = 102536864180. Its totient is φ = 66152815560.

The previous prime is 82691019473. The next prime is 82691019487. The reversal of 82691019475 is 57491019628.

It is not a de Polignac number, because 82691019475 - 2¹ = 82691019473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82691019473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1653820365 + ... + 1653820414.

Almost surely, 2^82691019475 is an apocalyptic number.

82691019475 is a deficient number, since it is larger than the sum of its proper divisors (19845844705).

82691019475 is a wasteful number, since it uses less digits than its factorization.

82691019475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307640789 (or 3307640784 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 82691019475 in words is "eighty-two billion, six hundred ninety-one million, nineteen thousand, four hundred seventy-five".